Online used gun stores?

Is there any trustworthy online store that sells used guns? Checked out gunbroker but would like to buy outright if possible vs bidding on them. Currently fighting someone on a gun but thinking about just checking online stores instead.

Bought a full size 9mm recently with the intent of being a farm gun and not for concealed carry. Was going to buy the dagger compact (or micro, was unsure) but wouldn’t be able to get to the FFL anytime soon to pick it up so holding off for now.

After digging through my gun safe, now I’m wondering about getting a 45 instead and possible a small one (prefer not 1911 style) for potential CC if I ever decide to. Was thinking Springfield XD-S mod 2 size gun but was thinking just getting used to save money. Any suggestions on what gun I should look for in 45 that is not a 1911?

Reason I’m thinking about a 45 is a family member gave me their defective Firestorm mini compact years ago and I tried to fix it. Bought 200 rounds for testing only using maybe 20 rounds. When I traded the gun in since I was unable to fix it I promised the ammo to someone about 4 years ago and they have yet to get it. Deciding I’ll keep the ammo and just shot it myself.