I hold a non b multiple entry visa good for 6 more months i am not working job did not work out have a small overstay. other than the fee at the border for overstay will i still get my 90 days stamp

While the Visa is valid it can still be used.

Overstay is 500 Baht a day.

thanks i have heard all sorts of things and most say same thing as you but as my first time to border wanted to clarify

Check your passport stamps both in and out, especially returning, you are responsible for incorrectly dated stamps from immigration, could require a second border visit to sort it out...