Liberty Dollars are VERY collectible. Unusual World Coins by Colin Bruce is the best printed resource for collectors. Liberty Dollars have been listed in the two latest editions. There are several pages of the different varieties (all gold, silver or platinum). Prices are not up to date, but that is to be expected with the government interference they have been experiencing. Ron Goodger's website, Liberty Dollar Encyclopedia, is a better resource. It does not attempt to supply pricing info. Production has been low since the raid and later stopped altogether. Pricing is all over the map on ebay. The common pieces can be had for a few dollars over spot but rare ones are very expensive. One ounce, 1998 silver will cost you $500-$1000. That is not even the rarest. NORFED started in 1998, producing only a one ounce .999 silver medallion. 5 years later (2003) they began making fractionals also. Most fractionals are going for double spot price or more. The NORFED acronym was dropped several years into production. Collectors like to identify all Liberty Dollars this way though, to keep them from being confused with "walking libertys", "seated libertys" and other US coins. Search "NORFED" on ebay to find a selection of around 400 offerings. I collect these myself. They are beautifully struck (double struck on polished planchets with polished dies), making them technically "proofs". They were not marketed as proofs however, because they were intended to circulate. The founder of the Liberty Dollar, Bernard von NotHaus, was convicted of counterfeiting two weeks ago, so no more Liberty Dollars will ever be made. Check one out yourself. Does it look like any US money you ever saw ? It is way better ! The jury must have been blind.
The Liberty Dollar Encyclopedia website posted above is really well done. Anyone interested in Liberty Dollars who likes the site should consider sending the guy a little money to compensate him for his efforts. I'm sure even a buck or two would brighten his day.