maybe a case of too good to be true???

so i've had my ohana now for over a year and a half and i bought it for about £300 ($457). just now, i decided to take a look at what this model is selling for now,
take a look at this,
http://www.wmcmusic.co.uk/ukulele/t...g-tenor-solid-koa-top-back-sides-19-fret.html

this one is seeling for £575 ($877)

this has got to be too good to be true, the only difference between mine and this one is the die cast tuners, i have pearl essenced. but that can't be worth £275 ($419)

or have i just got lucky

Elderly has it listed for $479. UkeLadyMusic has it priced at $639. Looks like the difference in price lies solely due to the different sellers.