It depends on what you mean by "good buy". It certainly is not your average toy in the dollar section.
It is an extremely good buy if you buy it for someone else as a present and if they have Wi-Fi (half of the iPod Touch's capabilities are restricted to Wi-Fi use, so if you don't have Wi-Fi, it isn't worth the buy).
A second generation iPod touch costs $200 if you buy it new
iPod 4th generation because it has 2 cameras
A good website to purchase a IPod Touch 4th generation would be from the Apple site in their refurbished section. Another good place to purchase a cheaper IPod Touch would be on Amazon.
If there is something wrong with 3G iPod then usually best buy will take it and give you the 4G.
If you have an Ipod Touch 2g and you upgrade to 3g by using itunes and the ipod is not jailbroken you have every thing when your are done upgrading...!
Yes, there already is an Ipod touch 4th generation you can buy it at apple or bestbuy.
Yes there is a new iPod Touch 5th Generation out! You can buy it on apples web-site for $299!
The most memory that I have heard for a Ipod touch is sixty four gigabytes, which is for the third generation Ipod touch. You can buy them anywhere online.
You cannot upgrade the RAM on your iPod Touch. The RAM on your iPod Touch is permanent, and if you want it faster, you must buy the newest generation of the iPod Touch.
No, the only way to have iPod have the function of a camera is to buy the 4th generation.
It depends on the generation. If you seriously want to get an iPod Touch, then I would suggest getting the second generation or later. It is not worth it to buy the first generation at this point in time.
You can't buy one anymore. I recomend the 4th generation.