The Waterloo Medal as issued in 1815, depends on who it was issued to.
if Heavy Cavalry then £1800-2000
Scots Greys - £2500-3000
Light Cav - £1500-1800
Royal Artillery - £1100-1300
RHA - £1200-1400
Foot Guards - 1st, 27th, 28th, 30th, 42nd, 44th, 52nd, 73rd, 79th, 92nd and 95th - £2300-2800
also rans - £1300-1600
Kings German Legion - £1000 ish
Colvilles Division - £1000 ish
Hope that helps!!
CF