The Haier 19" flatscreen w/built in DVD player is curently being offered on-line at several sites for as little as $135.
Although it is listed as a 120-240 VAC TV, it actually runs on 12 VDC without using the external power supply.
We have a 24", 1080p version of this set, also running on 12 VDC, and are pleased with the quality of image, variety and number of inputs, and ease of set-up & use. Ours pulls less than 3 amps with the DVD player running. Back of set has a standard VESA 4 X 100mm mounting pattern.
Here is a link to the manual:
As there are a number of sources, just google: haier lec19b1320
and see who has the best offer including tax and shipping.