First place, you're going to have to search long and hard for a 10 in any decent condition for 250 bucks. They're going up quick and have always been high down here. Me, I'd go with a Makarov. My son-in-law has one and I'm sorta impressed with it. Trigger ain't bad and the thing is amazingly accurate. Sights sorta suck, but it's a lot more carry friendly than a M10. Well, if you could find a 2" M10 round butt, you'd have a more carry friendly revolver, but they're even higher down here. The Mak is a little big for pocket carry, but it's really flat and light and disappears in an IWB and a spare mag is a lot easier to carry than speed loaders and faster in use. I like .38 special better than 9mm mak, though. It's the trade offs that you'll have to decide for yourself. If you do find a M10 in good shape cheap, you'd better not hesitate or one of these vultures around here will pounce on it before you can get your wallet out. LOL
I have a M66 Taurus 3" I carry sometimes. You'd be surprised how much a lousy inch of barrel can make a difference in carry comfort. Still a bigger,heavier gun than a Mak to tote all day, though. My favorite carry is a 9x19 Kel Tec P11, 100 percent reliable, very accurate, and pocket friendly in a caliber superior to .38 special from a snub and packin' 13 rounds of 'em in a pocket friendly gun. I gave $263 for it 12 years ago. They can be had for that now. It's got a trigger you have to get used to, but I like it better than most revolvers, a little longer, but a lot smoother. The KT's get bashed about as much as Taurus, but I'm here to tell you they're both fine guns, at least mine are.