The colt revolvers from that era have very tight tolerances. It could likely be lead on the cylinder face or WD40 from a previous owner or the original lube hardened, He did not buy a performance revolver. He bought an antique that is a work of art. If he chooses to beat it like a rented mule...
First person to write I will take it for X number of dollars gets to set a date and time to meet.
If you are driving more than 5 minutes talk with them on the phone when the first person gets on the road. Decide how far you want to drive and communicate this to the buyer when you decide on a...
Until an exact time place and conditions of sale are agreed upon by both buyer and seller the seller can do anything he likes with the item.
I have this directly from a mod when giving a welcher a negative feedback.
I have had sellers back out several times, just move on and remember not to...