I'll admit I don't often consider resale when I buy a gun. I don't because I don't like selling once I have acquired; guns, tools, and books. That isn't to say I may not sell a few at some point but if I do it'll just be to thin the herd. But I buy specific guns for specific reasons. I have a habit of building what I want so I get exactly what I want, so I get something specific to do that with.
That being said, I look at the purchase of guns and tools the same way. If you're going to use it once then you're going to use it again and you should get the best you can. If you buy a cheap, crappy tool and it breaks the first time you're trying to use it, forcing you to buy another one, by the time you buy the second one you probably could have bought a good one, once. False economy costs you more than getting something higher priced and higher quality to begin with. The lowest bidder usually gets you the lowest quality.
As long as you're careful and educate yourself on the product, you tend to get what you pay for.