Well i've found a list of very expensive domains names, i'm not really sure if this is totally accurate, but if it is anywhere close to the figures mentioned beside each domain name, it's definately quite alot!!
These domain names are between two and five charactor in length.
Ayway here is the list of fifty
go.com = $94,769,040.00
dog.com = $70,363,839.00
net.com = $62,831,365.00
shop.com = $49,751,714.00
cat.com = $47,037,988.00
ebay.com = $42,119,390.00
love.com = $40,509,698.00
email.com = $32,677,183.00
info.com = $30,414,098.00
web.com = $29,809,025.00
free.com = $29,727,342.00
abc.com = $26,292,960.00
food.com = $24,990,650.00
it.com = $23,371,140.00
chat.com = $20,402,118.00
help.com = $18,294,958.00
yahoo.com = $17,756,531.00
vote.com = $17,320,698.00
live.com = $16,384,226.00
html.com = $15,134,202.00
ign.com = $14,869,594.00
xbox.com = $13,451,792.00
usa.com = $11,435,144.00
google.com = $10,875,620.00
z.com = $10,661,951.00
sony.com = $9,489,508.00
hell.com = $8,429,662.00
pool.com = $8,360,122.00
site.com = $8,064,446.00
mamma.com = $6,876,160.00
red.com = $6,835,999.00
us.com = $6,725,700.00
spam.com = $6,706,700.00
logo = $6,570,858.00
lg.com = $5,874,920.00
gov.com = $4,432,255.00
blue.com = $4,178,014.00
house.com = $3,784,584.00
legend.com = $3,525,732.00
icann.com = $3,486,000.00
dot.com = $3,191,552.00
buy.com = $2,579,011.00
edu.com = $2,920,300.00
excel.com = $2,793,212.00
god.com = $2,487,593.00
cool.com = $1,616,062.00
joke.com = $1,538,882.00
yes.com = $1,518,127.00
w3c.com = $1,348,078.00
lol.com = $1,093,141.00