It really depends on which xmod it is and the generation, the old gen1 one brand new 60 bucks easy..some people have then listed at 90 or 100 bucks but myself i would never buy one at that price even if its new.
Probably at most $100. Even though the upgrades themselves cost a lot, the actual performance gains are not significant, so they do not make the Xmod's worth very high.
eBay is used to sell new, used and antique clothes as well as clothing accessories.
No they are not. They sell new things too.
eBay
There is no definite time when RadioShack releases their new Xmods. All there is to do is wait for RadioShack to put them onto the shelves.
you could get a ton of money and sell it on ebay
sometimes both.
sell them on eBay
If you have a new iPhone 4, you have a product that is still in high demand. A new unlocked phone can sell on ebay currently for upwards of $400 due to the high demand right now, and the low amount of supply.
you wont get much money trading in, i recommend you to sell it on ebay, you can get some $200+ depending on it condition
No, eBay sells brand new, authentics, knock-offs, used, very used, etc. There is no limit to what you can find on eBay.
Ebay would probably be the best bet for trying to sell new equipment. Take multiple pictures of the printer, it helps to authenticate that the printer is indeed new.