If you are looking for a budget-friendly touchscreen LCD monitor, you might find this touchscreen LCD monitor from Chinavasion handy for you.
For only $206.10, you can get a 19-inch touchscreen LCD monitor that features 1440 x 900 native resolution, 500:1 contrast ratio, 400 cd/m2 brightness, has both USB and VGA connector. Yes, according to the description, this CVJU-E130-2GEN can receive signal from USB connection. I doubt how the quality is, but it’s enough to proof that the display is future proof, as long as you’ve got a USB port in your computer, you can use this monitor as the secondary display.
If you are interested, you can get them at Chinavasion now for $206.10, or cheaper if you are willing to buy more of it in one invoice.