What's a good quality Tin Snip ?

[FUNFER2]

I have a old school 12" long tin snip. I need to start cutting some aluminum sheets for the cobra and other projects. I guess I did not realize they come in straight, right & left cutting. Tells you how much I've cut metal !

My intentions are just for home projects, not a professional full time job.

Please explain how the straight, right & left cutting snips work.

For price, big dollar descent always mean great quality, so what brand is middle of the road ? For instance, I believe that "Snap On" tools are overly priced. Nice tools, but too high $$$

What type, size and brands should I check out ?

For most projects, do I need all three ?
(ebay sells a lot of 3 in a package)

Are "aviation" snips any better and what are they ?

EBAY-
tin snips | eBay

AVIATION- (on ebay)

aviation snips | eBay

I will appreciate your schooling & advise.