I just went to purchase a heat gun to flash my Plastisol and they had 8 to choose from. When i asked they told me the most expensive one was the best ( of course )!!
in theory, if you're just flashing all you need to do is get the ink dry right? Then I'd assume that the cheapest gun will work just fine. I bought mine for $10 and it worked when I needed it.
Will any heat gun do?? 
