As for price on the 1st Saddle, the Martha Josey name has been used my several Saddle makers, hard to say which one you have, so not sure on price.
The 2nd Saddle from what I have found goes for 1,800.00 to 2,200.00 new depending on the actual Saddle Maker, so used for 800.00 seems fair.
Condition of the Saddle is everything in the pricing of a used Saddle.
A brand name of who made it, ie Circle Y, Action Co., Longhorn, etc. and Pictures would really help.
Some Martha Josey Models by Action Co. sold for 1,200.00 when new 5-6 years ago, so if for instance if they were the Saddle Maker, those used prices would be a little high unless in 90% new condition.
May all your Trails be happy and safe ones