Trapdoor Rifles

I have an SRS 1st Edition Serial numbers book in very good condition. After 20+ years I'm finally looking to part ways with it. Before I go down the path of ebay or on our table at the Balt Antiq Arms show next March, do you have any insights on what the current value of this book is? Thanks

1st editions are priced anywhere from 150.00 to 250.00 depending on condition. Think I paid 175.00 for mine which is in like new condition.
There's a couple posted on eBay, one has a 99.00 bid on it.
I have all but the 1995 1st edition which has been on my wishlist for some time.

My Volume 1 is in tatters, but it will serve my limited number of remaining years on the planet! Besides, it has a nice personal inscription from Frank . . . Unfortunately, either through financial hardship or poor personal choice, he did the first edition of his book, and V1 of the serial books very much "on the cheap". They have NOT worn well. But, his second edition of KRS, and the rest of the SN books are just fine.

Thanks!