i started investing in coins. my pops turned me onto them. he got started in 1999 with a proof set. the set cost him about $35. today that set is worth over $350. i'm a pretty fast learner, so i did alot of research on them and even bought a few coins myself. i even bought a bar of silver and gold. (100 once bars) i bought a set of platinum coins in 2004 for $2000 they went up to over $2800 in 6 months. not sure what they are worth now.
i even bought 15,000 wheat pennies. 3 big ole bags. about $225 a bag. the penny will be 100 years old in 2009. i will be selling them on ebay in 2009 and charge $2.99 just for shipping and handling alone for one penny. ebay taught me alot about collectors. if you need a coin to complete a set, you'll pay the shipping charges and not even blink.
my goal is to pay off my morgage with porn in a year or two (if we have that long) and hustle coins on ebay.
check out
http://www.usmint.gov
coin prices
http://www.pcgs.com/prices
ebay coins
http://coins.ebay.com