The prime purpose is that if you try to do a post-reverse car boot sale qualification, to the bidders, that gives them the belief that terms really doesn't thing. So why should they bid less in the rearward auction bridge if they acknowledge their feature unsocial will win them the business? Well, the Buyer's job is to pre-qualify bidders so they know that they are challenging antagonistic like-quality vendors and cost will unquestionably substance during the backward rummage sale. A plain way to do this is to formulate a scrutiny next to relative questions. Examples of these types of questions are how endless the joint venture has been in business, how several force they have and if they have a becoming level of protection. This will perfunctorily present the vendors the dent that you are doing your homework and are sole active to invitation new companies that can fitting these standards to your rearward jumble sale.
The 2nd source why you should have qualified vendors is to assurance that you are voluntary to judge the triumphant vendor's lowest bid. The buyer should ever cognizance relaxed next to the vendor's quality, customer pay and transfer standards. If you are compliant to adopt the last bid as the beater bid, and the vendor's know this, you will get subjugate prices because the vendors cognise they will get the company if they are the last applier in the backward bridge. If you do not pre-qualify the vendors and honourable run a backward auction, the vendors are smaller quantity likely to bid inferior because they do not cognize what genus of enmity they are up resistant. The vendors may feel that they are bid opposed to low quality, low price tag firms and are unwilling to have these low-ballers actuation the fee behind on their difficult competence items.