how valuable are 3 character domain names ? i se some one sedo like b5d with a bid of 500$ are they really that valuable ?
Pretty valuable because of their convenient short length and memorability. I think they're all taken at the moment, but they usually cost a high 3-figure sum minimum. Better still if it's something that's actually a pronounceable word!
4-letter are generally not as valuable because there are more combinations of letters/figures and they are less memorable.
Supply & demand tied with availability helps increase prices. I managed to buy a 1993 LLL.com last week which will hopefully be a great investment! It will take quite some time for LLLL.com's to catch up, adding numbers dilutes the value a lot but certainly has some value.
would 3 letter domains with swedish letters like åäö be valua? example (påå.com) and how is domains like (p3a) etc? do that count as a 3letter domain or not ?
Here are some prices for 3 letter and character domain names. http://www.3character.com/priceguide.html
Well, it depends on if it's a LLL.com, NNN.com, LNL.com, NLN.com, etc & also the quality of the letters and/or numbers