I would like the Membership's advice on next firearm to buy

I'm looking to acquire another firearm and I'm not sure what to buy but it can either be a rifle or a pistol, fun to shoot and I wanted to ask the general membership for some opinions.
Here's the qualifications, $500 or less, affordable and available ammunitition, more powerful than a 22lr (I have several), I would like to buy it "Used" either on internet gun sites or in a gun store, so it must be readily available on the market.......Thanks
I can't wait to hear your ideas!

Hard to make that kind of sugjestion for someone else.

Ill tell you that my last purchase was a SKS. Well under 500.00, ammo can still be had for 6.00/20 rounds. Fun to shoot and if you want, you can hunt deer with it. It also has a bayo, which adds cool factor for my sons.

Im thinking my next fun gun might be a NEF single shot in 17hmr. I noticed a Used one at a local shop for 115.00 which leaves some money left for a scope. A fun plinker that shoots faster and farther than a .22 and many use them for small varmint shooting out to 200 yards.

Not really suggestions, just whats rolling around in my head these days.

They both are good ideas, I looked at the NEF offerings and they have a good selection of rifles and the .17HMR would be fun....Thanks