how much should I spend to get a better turntable than my current turntable?


You want details hah!
I bet....

CURRENT: mmf-2.2. A lemon, a complete junk in my opinion. A disaster from the start. What I can I do with it? It was delivered with missing screws, the lift arm level broke in 3 months, all I got in the name of warranty a list of things not under warranty. I don't want to criticize the brand, maybe I just got unlucky, they are otherwise great. 

What should I get for the littlest investment that would work better than this wobbly, squeaky  thing? 

grislybutter

Just go and get a new Rega P2. Simple and well made. Nothing to go wrong.

The cheaper Project are junk in my experience.

I bought a new Pioneer PLX1000 to add to my collection of vintage TT’s. For $699 it is competitive with the several times- as-expensive Technics TT’s. I put a Denon 103R ($340) on it. Check out Herb Reichert’s review from several years back in Stereophile.

Another plus for the PLX1000 is the included pair of high quality RCA interconnects! Way to go Pioneer!