Darrel, from what I understand, the water intrussion issue has it's greatest frequency in the 500 series Lowrance units.....you may already know this, but considering the price difference in a 522 and an HDS5 which is not that great and the fact that the HDS unit comes with a 2 year warranty, you might be better off with the HDS.

As far as a source, I'd check that link above and J and H products as well. Past that, there's always Ebay (yuck) or boards like this one to search through, as well as craig's list. Used, you're looking at $400 to $450 with no warranty and a new HDS is gonna set you back in the 7 bill range - on sale at Cabellas BTW.

Wannabe...