Value of Macarri R9 Tarantula .22?

Greetings, what's an approximate fair value on a like-new Macarri Tarantula R9? I purchased this from Jim perhaps 15 years ago (would need to see if I can located the actual date) and have put perhaps 400 pellets through it. It has the regular stock, moderator, etc as well as a Swift 20x spring gun scope. Just wondering....

thank you
John
 
Thanks for the $ range. I believe it to be the factory stock. Yep, I purchased the rifle directly from Jim years ago when he was building them. I think is was called a Tarantula TX R9 if not mistaken, as I recall there was a significant wait for them back then. I also purchased one of his high end DIY stocks, but never had the time to complete it and sold it years ago. Not that it moves the value needle, correction on the pellet count, looks more like ~175. I remember purchasing a pre-packaged assortment of pellets when I first got the rifle, then purchased (3) 200ct tins of the pellets it liked most. First tin has a few in it while the other (2) tins are sealed. Thanks again,