If you're trying E-Bay, right now there were hardly any used units of the model you want. You just have to keep looking. If you find one and it's a "bid" not "buy now" then just put it on your watch list. Don't enter a bid until there is only like 30 seconds left on the auction. Enter the maximum amount you are willing to go up to. The E-Bay computer wil keep increasing your bid to beat the other bidder until you win or get to your entered maximum. You have to be patient to find a deal. There is a company that sells some used units of different Lowrance models Elite 4s, 5s, etc all different versions. The ones they sell are units only but if you have the needed transducer all else you need is the base, or shop for a transducer also. If you look there are some good deals even shops selling new units complete. Here is a link to that company I bought an Elite 4 head from it's great. Again don't bid till it's almost over so as not to bid up the price too early. Good Luck.
http://www.ebay.com/itm/LOWRANCE-ELI...item3cdfd045b0