Front / Rear big bumpers

Just wondering if anyone knows what sorta price i should bid on them, found a couple pretty much identical to my colour, which i didnt think would be likely.

there immaculate and come with the irons undamaged, unlike my bodged irons lol.

Really want to win these but obviously dont want to skint myself over them so any helps appreciated

Front: - http://cgi.ebay.co.uk/Vw-Golf-Gti-Mk2-8v-16v-Front-Big-Bumper-Blue-Excellent-/260784896663?_trksid=p5197.m263&_trkparms=algo%3DSIC%26itu%3DUCI%252BIA%252BUA%252BFICS%252BUFI%252BDDSIC%26otn%3D10%26pmod%3D260784893687%26po%3DLVI%26ps%3D63%26clkid%3D63911911832440340


Rear: - http://cgi.ebay.co.uk/Vw-Golf-Gti-Mk2-8v-16v-Rear-Big-Bumper-Blue-Excellent-/260784893687?_trksid=p5197.m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D5%26po%3DLVI%26ps%3D63%26clkid%3D63891314306667096

i was about to say £20 a piece! but i am a notoriously tight bastard

if there genuine bumbers they can go for alot more