I am looking to buy a new amp for practice and jamming. My budget is around 120$.
I have a Greg Bennett Les Paul styled guitar and a Digitech RP 255.

I have been searching for an amp to play the RP255 through.

The problem is I cannot try any of the amps and its next to impossible to get a decent used amp so buying a used amp is not a possibility for me.

So far from what i've read i like the Blackstar Core 20 and the Mustang 1 V2 but I understand i can't place the fx before the pre-amp and they do not have an fx loop.

Is it safe to plug the RP255 into the AUX ports of the amps or will it damage the amps.
Be great if you'll could also suggest any alternative amps to play through.