I understand your point nelsoni but for a lot of us you either go cheap or you might as well replace the projector. Theres no way I'm going to consider paying £250 or more for a new lamp when a whole new projector can be had for £400 for a similar entry level projector. If you can get just the actual lamp cheap from hongkong for lets say £120-135 it gives you another choice. I've seen this seller on ebay.com
eBay Store - ping ngo shop: projector lamp
Seems pretty reasonable.
Obviously for high end projectors its a totally different decision.
The difference in pricing can be quite extreme from about £440 in the uk for a lamp assembly to about £120 for just a lamp itself from hong kong.
I mean if the lamp is duff you can claim back the money from paypal or your credit card.
It certainly makes sense for 800x600 resolution projectors or less.