price to ask from greeting card / publishing company

I'm sorry but it's all so complicated. I've just received this

response from a publishing company that does greeting cards and it

will be the first official sale of a photograph for me!!

 

"The photo you sent (bird on the ground) is just what we are looking

for. We prefer to buy designs outright but please let me know your

costs, terms etc."

 

Can someone please give me a reasonable price range to request (I

live in the UK but understand $ as well), and basically tell me what

to say to begin negotiations via email (I've never negotiated

anything, usually just taking the first price offered). The added

variable in this is that I ultimately don't care about the photo,

don't think it was very good but sent it knowing that it might suit

their needs. However, I need to know how to do this because I'm

sending lots more out this week to other greeting card companies and

will be sure to be faced with this question again soon. Thanks in

advance to all you experts!

sorry i cant answer your question, but i'd personally be interested in seeing the photo you submitted.