If you're looking for a replacement and can get away w slightly less wattage, there's an
eBay seller listing 24V Xantrex Prosine 1800's (110V w GFI Outlets)
for $615 ... slightly half what they go for new everywhere else. Picked one up last week and can attest to "new in box" condition. It's a pretty sweet, well built, true sine wave HF inverter.