New ones are about 120 to 140 fitted at home by someone else! That would be my advice , also get a laminated one and not an original toughened one if you do buy a second hand one.
Found a new, laminated one on eBay for £89, fitted for another £35 but that is at their place in Warwick. Who comes out to fit them? Happy to fit myself but don't have a good track record with windscreens....
your local windscreen supplier should be able to do it ,I went to one if the national chains ,they did it next day