Saddle help!

[Grey_Eventer]

How much should i be asking for a nearly new (hasnt been used for the last 2 years, is excellent quality) saddle.
I dont know the size of it so how do i meausre it?
And where is a good palce to sell a saddle, im thinking Ebay, but not sure if thats the right place, anyone got any other ideas?
This is a link to the saddle:
http://www.thesaddleryshop.co.uk/P/Wintec_500_All_Purpose_Saddle-(121).aspx

They are fairly expensive so what should i price it at?
thank you

 

[MrsMozart]

For length, measure from pin near pommel to the centre of the cantle.

For width, measure from D ring to D ring.

For completeness, measure the sadle flaps as well.

 

[rach1984horse]

The Width is sometimes printed on the stirrup bars.