In brief, if you have one tiny, simple, inconsequential job to do, then get a cheap disposable helmet. If you plan on actually welding more than once, then do a lot of research. Talk to actual welders who weld for a living. Welding instructors at the local tech school can help. Buy the very best. The author of the other guide is correct when he says that you get what you pay for. It's easier and less frustrating to have the right tool for the job than it is to save $50 up front but then suffer $200 worth of set-backs and do-overs.

I speak from personal experience here: The good helmets are good. The cheap ones are junk.

The good ones will have a large viewing area- roughly 2x4" and will be adjustable as far as response time and shade. The good helmets will be made of injection molded plastic (not plastic sheet riveted together), will cover the head, with a NICE ajustable ANSI style suspension. If the helmet you seek to buy is under $30, be advised that a good suspension alone retails for about $30....

Brands to buy: I don't want to get brand-specific and endorse a product which may not be right for you . Do your own research. You'll be glad you did.

Where to buy: As above, I don't endorse anyone in particular. Make a product decision first, then do your comparison shopping.

Final word: Everything about welding is quality dependent. You REALLY do get what you pay for. Think long and hard before you try to economize too much. (If you weren't econmically minded, you would NOT be on eBay in the first place.) You may well pay for it later is diminished productivity, premature tool failure, or an injury.

This applies to buying used equipment too. Gauges have to be calibrated or rebuilt. SAFETY WARNING: NEVER buy used gas hoses. Torches have seals which can leak. Arc-welding machines have a LOT of electronic parts which can fail. Wire-feed units (like the LN-25) can be very finicky when used. Self-contained units (gas or diesel driven) have engines which wear out. Plasma cutters are prone to wear. Repairs are MORE expensive than buying NEW in the first place. If you do decide to buy USED, work with a vendor who will stand behind the unit for a reasonable period of time (say 90 days).

Good luck in your welding endeavors!

Safety FIRST!

Greg