#1
Im discovering how my clean channel breaks up on my tube amp and quite like it. I would like more break up to hear how it sounds but volume is an issue. So I thought about an attenuator. I know you can buy them from the gutar store but what about the ones you see at an electronics store that are less money? Any experience with those?
#2
Those attenuators are made for dimmers and other devices where impedance is not a consideration. Some people have used them successfully, but I would go ahead and just assume it's going to turn your output transformer into a pool of molten iron sooner or later. They're less money for the same reason that cling wrap is cheaper than condoms. Same idea, but...not really a good time to be frugal.

The good news is that making your own attenuator is not terribly expensive, and pretty simple. I'd choose that route if you want a decently cheap one. Weber also makes some inexpensive ones that are even cheaper used.
#5
The problem with attenuators is that if you don't spend a fair amount on them they tend to affect tone. I would suggest you have a look at a Rivera Rockcrusher, not sure of your budget, but I have one and tone isn't affected too much at all. slight compression and tighter bass end, barely noticeable unless you're out to hear a difference. Or if you can find one, get an Ultimate attenuator by Magus Innovations, best attenuators ever imo, cant hear a difference in tone at all, unless you're a dog or somethin'.