Around $250 consistently on eBay, but the Kenwood NX-1300 DUKx is a great radio. Kenwood's have great DMR audio quality and my NXDN NX-1300 has been great for the year or so that I used it every day. With an extra upgrade it will do 40 bit encryption that I think is compatible with Motorola Enhanced Privacy but I'm not 100% positive on that. It does have encryption without an upgrade but it's fairly weak. Stil good enough to block scanner listeners.
K is 450-520 with no front display
K2 is 450-520, and it has a display with 7 front buttons.
K3 is 450-520 with 4 buttons and a full numerical keypad
K4 is 400-470 with no front display
K5 is 400-470, and the same button layout as a K2
K6 is 400-470 with the same keypad layout as a K3
NX-1200 is the VHF version, but I haven't seen many of those floating around. Available in K, K2, and K3, depending on what display and keypad you want. Band split is always 136-174.
Brand new from a dealer with no discount is around $300-390 depending on keypad configuration when I last checked IIRC. Also since K2NEC mentioned it, I'd be willing to program them for free.