The only thing decent in your price range is a Lincoln or Miller or hobart "Stick" welder. All are going to require a 220 50amp outlet to operate.
110v welders are really meant for light work, 1/8 or less. Thermal Dynamics makes a 110 unit that fits your price range. The local shop sells them and warns that they are really only for repairs not fabrication.
Sign up for TSC's email flyer they send out a 10% off coupon about once a week on various stuff. About every other month it will apply to a welder.
Getting a 220 outlet needs to be your first purchase.