any advice ?

hereinafter the contents between one of my potential customer and me .When the businesstalk proceed here, it is intermitted for the price , i  really don't know how to  carry on,any good guy can give me some advice?
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在您的来信中曾经提到:
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>To: "sales@wehappyinkjet.com" <[email]sales@wehappyinkjet.com[/email]>0L#[f8o7p9U
>Subject: Re: Re: Price for HP 21 U!CM ?"g&D
>Date:26 Jun 2008 08:12:19 -0000
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>26th June 2008
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>Dear Bill, u}2zq#Bd v
>

s[*D$z9G8y*X~,J;a#E!N;w >Many thanks for your e-mail. We are really sorry at your price we cannot sell your product because your price and HP 21 B cartridge price is same and Customer will not accept Compatible cartridge at same price of HP.
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FR'TVl7qn \8Q >If you wish, we can try your product but our price will be final.
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>Best regards,
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1r@\%}"F"X:U/y >For Sumanglam International J*B7A+E0L
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>Sharad Midha  
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w`l1];Z@C6x >On Thu, 26 Jun 2008 [email]sales@wehappyinkjet.com[/email] wrote :
&m3vY_ Y;On >>Dear sharad midha,
;T`,e'HA$t >>Thank you for your quick reply. The price we offered is the best on market .The quality of products we provide is of the best quality overseas .6Pw%jBc3Qy8wf
>>The 3.5USD/pc for HP21 we are not in a position to accept .V&d8f-g6H Ou)C;OsP
>>Indeed , this is our first business and you never used our products and do not know the quality of them .What we attract you only is the price now .
x%sX^1n&h >>Best regardsP]] T9~
>>BILL YIN2ZA%X Z|Q7d6R
>>
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V$C*N;J >>在您的来信中曾经提到:.z:SXWs&}Lz#V7Yp
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>> >To: "sales@wehappyinkjet.com" <[email]sales@wehappyinkjet.com[/email]>
9x0Ka-met.Q&e >> >Subject: Re: Price for HP 21kaf+O0hS
>> >Date:26 Jun 2008 06:57:16 -0000
Ku9e4Qf >> >
S3gz;n8WV)R]g8{u >> >26th June 20082Gz2LI+Q
>> >T[7yb*pY
>> >Dear BILL YIN,
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>> >Many thanks for your e-mail. You rates are not acceptable to us. Because in India HP  21 B is very very popular and their price are the same as that of your;'s. If you can supply us at better price of USD 3.50 we can work on.I:[N!b%W}/H
>> >b/J AH/H)|.I
>> >Best regards,
4u"oP8o3OmW,^ >> >!g;J~\FM.E
>> >for Sumanglam International
*I&YO'VG8M#S!KtI >> >
iLvw-?0\ >> >Sharad MidhaD ?$}F_6rk
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h)[*Oy!A Hu >> >
a'T,L9GvN >> >On Thu, 26 Jun 2008 [email]sales@wehappyinkjet.com[/email] wrote :
%Q,fkZra%s >> >>Dear sir`/Au*b0F6D
>> >>
J&CJN)K9C)W >> >>How is everything going ？
/d$vZq-v+bP >> >>Jv O:l-@*C&Ku4m
>> >>We know you  from  Asia Pacific Remax which was hold in june,2008.According to your last request,we offer our ex-work price for  HP 21(compatible) ,Which is  4.3 Usd/pc.
)h IvT%Kb)a >> >>Further information , pls feel free to  let us know ,we are ready to  service you at any time .7AB7d#L:|j
>> >>
4]cE/]*U >> >>best regards and  thank youOzl,mM8^xR
>> >>&z ms;C}$Y|
>> >>BILL YIN
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>> >Write To You Soon{+@w:@8\%cI
>> >For Sumanglam International
i7Qw5LK's4`@5xV >> >Sharad Midh
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>Write To You Soon
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>Sharad

My customers talk about prices all the time,not only new customer,but also long-cooperated.!?u(Z;d9R Es
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As per the above experiences,i always add some percent for customer to ask for,anyway,i will give them our best offer at last.5Kb)wb_'|(i"`
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If you have given the customer your best offer,just insist in,business is for profit.

Thank u lily. You  may have  a point there. Yes maybe i should leave a space for customer to negatiate ,however the prices in the world market are so transparent .i am worried i  will not receive customer's reply when offer the price too high

Reply #3 billyyin's post

Usually i have 5-10% more,customers will talk about the price with you absolutely if he really want to buy the goods,in my opinion~

i really have no idea for bargain,coz for small home appliance,our price quoted has been the bottom line,if i add 5-10% in quotation,there will be no reaction any more.Really a tough problem.