Ellis,
There are a whole lot of details needed for even a ball park price. It's best to buy used working guns you can test fire and have a 3 day refusal on. The following is my opinion only. Beware! I'm wrong sometimes. The 1889 Marlin is a good gun but was only produced for a few years. Collector interest is low. Usually the bores are very bad from BP shells and the rag people used to stuff down the barrels to "keep the dust out". I sold mine[38-40] 70%finish, working perfectly, bore very worn but acceptable cas level groups for $350. The friend I sold it to said he would not sell it for that now.
The Colt is another critter. What "generation" is it? A cylinder for a Colt is very expensive for 1st and 2nd generation guns [and hard to get too!]. It ain't cheap for a third generation gun, but at least you can get it. A good shooter grade 70% or better 3rd gen gun with NOTHING wrong with it should go around $700. A second gen of like grade with nothing wrong with it mechanically will be around $1000 and up. The price is just negotiable when it comes to 1st gen guns. And each improvement in condition and remaining finish just adds to the value of any of these. Each problem detracts from the price.Look for parts that have been replaced. Check for cold blue or refinishing. Check to make sure all the screws are intact. Look for mismatched parts and clear readable lettering and numbers.
I repair Cowboy guns.I have an FFL. I even sell a very few. Got a 2nd gen 45 Colt NRA 71/2" bbl gun for sale right now. 90% or better outside. Not any internal wear, so shot very little. Some nicks and scratches. No box. It was made at the tail end of the 2nd gen guns so it has some distinctive features common to those last guns before the redesign. It's tight, unmessed with. I'd sell it for $1050 as original or $1150 with a top grade custom action job plus shipping, shipped to an FFL only refund on undamaged gun if not satisfied within 7 days. Ask Bill about my work. Our normal top action job fee on Colts is $160.$110 for lever guns. Parts other than the pistol springs are extra.
Hope that helps, sorry about the commercial.
Joe West
