Last time I over paid for a pair of glasses was back in 1996, After that the most I've ever paid is $100, and that was with the extras. With just the scratch resistance and stigmatisim script included, I paid $under $20 with a coupon code I got off a tv show. A lot of what they throw in is for vanity and usually paying for the frames in some cases. At most, I can't imagine ever again having to pay more than $200 dollars unless I wanted some designer or high fashion frames, there's no reason for it if you shop around, at least in the US.
This is where I shopped for my last pair of frames and paid under $20, but, I had a coupon, so the frames start somewhere at $40 and yes you do have to pay for extras, but unless you get carried away with unnecessary extras, the price shouldn't reach an outrageous amt. Even at the discounted stores unless you let them talk you into unnecessary extras, one should still be able to keep the cost reasonable. But then I am a samurai bargain shopper, the sword comes out till I've slashed prices beyond recognition.

I mean, some extras are nice, but, they aren't required for sight improvement, they are luxuries, really nice to have, if you don't mind spending the extra money, so I know for me, the added expense I try to see it as just that when purchasing the glasses. But then, I don't drive and don't need my glasses unless I'm trying to help someone else when their driving, so I'm one to talk. But I do follow that advice in other areas of purchases, except where cookies and cake are involved.

layful:
http://www.coastal.com/plastic-frames