(cheap massage gun) I am going to make a stupid purchase, help me minimize the stupidity!

I am looking to buy a massage gun for <=25 USD. I’m sure this is a stupid idea, because you probably need to pay more than that to get one that’s halfway decent. Or maybe the whole thing is a scam. But I’m going to do it, so please help me make the least stupid choice available to me.

My plan is to watch places like Goodwill and Craigslist for about a year, watching for deals. So my question to you is this:

Can you recommend any somewhat okay massage gun brands that might occasionally be available used for up to $25?

I don’t care about battery life, style or portability. I mostly only care about durability, power, and attachments.