iBox Nano $189 SLA Printer

[JRDM]

Cheapest? Have you heard of Peachy Printer? It's still in beta, but it's cheaper.

Granted, I don't think either of these are better than curiosities. If you want something for fun, these are fine. They're on the small side for build, and the parts will be a bit weak. They might help you make a nifty looking chess set.

[Feign]

Cheapest? Have you heard of Peachy Printer? It's still in beta, but it's cheaper.

I'm a huge fan of the Peachy, but realistically, the $99 Peachy package is just the laser, galvo, control and height sensor, you have to build the enclosure and provide the drip reservoir and build tank. They just recently opened their pre-orders to the public, with a "fully built printer" option that is $400 (if it's also pre-calibrated then that would very possibly pay for itself in headache-reliever savings).

The price actually seems reasonable for this one, the entire body uses exactly one manufacturing process and the electronics inside appear to all be off-the-shelf, so it's extremely believable that they'll make a decent margin from a $299 price tag.
That said, I'm going to say don't expect this nano printer until April 2015 at the earliest, I've not seen a manufacturing partner yet, and from the look of it they are expecting to hand-make them in-house, which I think they'll find is much more work than they expected. The only reason I don't push this out to September is that the fabricated pieces are all laser cut, likely in-house already, meaning no large factory line is needed... Though that also means this will be trickling out their doors in hand-made quantities, not pouring out to consumers in waves the way a mass-produced product would be.

The more I think about it though, the more I like this little guy. It seems like it's perfect for doing one thing: making 28mm wargaming miniatures... And anyone who has played Warhammer 40K can confirm, $280 for miniatures is fire-sale cheap.