Best I know (don't hold me to anything):
Past prints have been 24" x 36", heavy stock, and frame very well.
Some one-off custom cutaways (your airplane) have been in the 4-digit range. Many were less, and an RV probably would be. Your DC-3 or personal 707? Hmmmm....
The Model 12 limited edition, signed and numbered, was $250. Sold out.
The very popular Gee Bee print currently sells @ $49. Early editions signed by Delmar were more.
A signed print of Flash, Valkarie, or Beautiful Doll would no doubt be worth a fortune someday <g>
I've directed Tom to this forum and he will probably check in with the real information. In the meantime, ya'll keep up the "me too" and RV model of interest.