When you phone them with the correct Parts #, they will give you the current price. At least, that is what they did last time I ordered a while back.
I know of no way to get prices other than a phone call. They may respond to an emailed list of parts with prices but when you purchase them you will pay the going price at the time of order.
i don't see the sear spring adjustment assembly sold as a complete assembly, but for sure it will be cheaper to buy the separate parts directly from crosman, probably half of ebay prices. yes you can order parts by email. email the list and they'll price it and send back to you with payment options. at that time you can change the list if you need to , then re-send it to them. they'll price that list and get back to you with payment instructions. it was always a pain to do it by mail though. much easier on the phone. just put the most important parts on top the list. they'll give you a total at any time through the phone call. peacekj