Blackwoods Xpress has a 30% off deal for orders over $250 with free shipping.
Some notable deals in the Mig Welding range. For quality brand name welders these prices are insane!
Lincoln 180c Welder
$806.40
Lincoln Speedtec 200c
$1320.90
Cigweld WeldSkill 250
$839.30
Cigweld Transmig 200i
$1127.00
Cigweld Transmig 250i
$1369.20
Arc range includes
Cigweld Weldskill 140
$209.30
Cigweld Weldskill 180
$222.60
I'm sure there are some other good buys available.
The 2 cheap ones are arc, so not for ally.
The two cheapest are arc only - I've always used MIG or TIG for aluminium welding. But then I found this: http://hildstrom.com/projects/stickaluminum/.
If you are looking to weld aluminium I can recommend the Lincoln 180c. You will need to buy the spool gun though to use the correct wire. I have this machine but am upgrading to the 200c. The 180c is a proven welder, and setup for the DIY'r in that you have 2 dials, 0-9 A-G and you use the chart on the lid to set the machine up for the metal and thickness you are welding. This is MIG welding though, not TIG.
I can't comment on the Arc welders whether you can do aluminium.
would any of the two cheapest welders be any good for the 'occasional use'
just looking to weld some aluminium and mild steel
cheers