@napster,
There is no way to set your prices when uploading through Adobe Stock right now. The XS credits price at Fotolia will be 1 credit and the Extended license price at Fotolia is automatically set to the maximum price available per your rank (100 credits for silver and above).
You can reach out to me directly any time and I will be happy to do a bulk change to your pricing if you would like.
mhayward@adobecom
Kind regards,
Mat Hayward