$75 seems to be right. I got the "ROCK ON" decals, 2 sets in 2 colors for about $80 for 4" letters. If you really want to save some $$ try these guys out,
www.DecalDudes.com, I am ordering my girlfriend's lettering, "MYROCK". 10" letters spanning almost 6' for $17.99. I doubt these letters will last but a paint job is in the future. Website doesn't seem to work but here is where I saw them-----http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=26451&item=2409354 499