E.g. the already proposed Loxjie A30, but no more powerful than A50. AO100 is twice as expensive as A50, but really makes more sense? By the way, it doesn't have any more power either.
A300 and AO300 are both good, used Yamaha A-S200/201 or 300/301.
There are currently 2 offers on HiFi-Express.
Offer for the old
Sabaj A20a. I had it myself and it's pretty good.
Sabaj A4, but I can't say anything about that at all.
But you're just going around in circles.
You won't notice any big differences in sound between the devices in your budget, especially if you don't have experience.
My recommendation is very clear: first buy a cheap device that meets your requirements, e.g. remote control. Functions that you don't need and overpaid watts of power that you don't need are of no use to you.
If you sell the small amplifier at some point, you won't make a big loss. The more expensive the amplifier, the greater the loss.