Why is this RAM so cheap?

[arcsbite]

Can someone tell me what the deal is with this RAM?

http://cgi.ebay.co.uk/INFINION-2GB-...00095084979QQcategoryZ172QQrdZ1QQcmdZViewItem

Yes I'm aware it's not apple's and I don't think I'd trust it in my machine, but I don't know enough about RAM to understand
why is it so cheap?
why does it have the orange things instead of the big black covers?

Also, what actual damamge can bad RAM do to a computer?

Can anyone suggest anywhere I can buy good value safe RAM?
I've searched and checked out apple, crucial and orcalogic, just wanted some more advice.
thanks

 

[CanadaRAM]

It has some copperish cooling fins on the buffer chip only, not heat spreaders over all of the RAM chips. Looks like a cost-cutting move. Will it work in a MacPro? No idea. Do yo trust the eBay seller when they claim it is MacPro compatible? I certainly wouldn't. " Incompatibility is not a valid reason for return, a re-stocking fee of 20% will be charged." They could do a good trade just in 20% restocking fees...

Stick with a reputable seller, who has a real B&M location, and who tests and guarantees Mac compatibility, offers a lifetime (no 30 day) warranty, and who will take a no-cost return for full refund if it doesn't work.