I don't think rarity has to do with price in this case. I mean, you can buy 5 signed copies at a time if you want... that doesn't seem "rare" to me. Same with the Criterion Videodrome (and Criterions in general), the price isn't necessarily a reflection of the rarity.
http://www.deepdiscount.com/viewprod...uctId=24243721
Eraserhead AND his short films for under $50 dollars. Plus there's a 20% off sale right now if you use supersale as your coupon code. You can thank me after you place the order. ;)