Sorry but you won't get back what you put in it. Only buds can give you an offer we're customers just like you. Fill out the attached form and Bud's will give you a quote. Remember once you fill out the paperwork and take possession it's a used gun. It maybe 90-100% but it's still used.
budsgunshop.com/catalog/contact_us.php?printForm=trades

Bud's won't factor in the cost of your upgrades. That's just the cost of customization, you never get that back. I say Buds will probably offer you around $150-$200?
Fill out the form at the link below to see what Buds offer will be, no obligation to sell/trade though.
budsgunshop.com/contact_us.php?printForm=trades

It is like restoring a classic car, you will never get anywhere near the money you put into it.

Hi Dr Mark and welcome. Only Bud's would be able to give you a price quote for your consideration. Just fill out the information here and Bud's will provide a monetary value with no obligation. it likely would be a wholesale price since the firearm would be used regardless of condition. budsgunshop.com/catalog/contact_us.php?printForm=trades ----------- Cheers and stay safe!