Take that quote to two smaller/local suppliers and tell them to beat it.

Do your homework and head to some of the local suppliers and get pricing on the boilers.

We have commercial credit accounts with local suppliers and often have pricing that's specific to us.

suppliers?

If the material cost is significant we tell the contractor we will pay them on the start of first day, or they can put us in touch with their supplier and we will pay the supplier directly. 

I'm of the opinion that there's nothing wrong with making money and there's nothing wrong with a company getting profit if they are offering value - and in our case the overriding considerations we have used to justify this decision are that:We should be doing something more valuable with our time than handling service calls (and we have those opportunities in the hopper)We have higher 'costs' (lets call them transactional costs) associated with constantly trying to maintain a network of competent service suppliers. 

I'm redoing  a condo kitchen in Hayward - low/middle end. I like the reasonable prices of Chinese quartz, but am concerned because the quality really varies.  Uni-Tile, East Star, Sincere . . .   Who is a REPUTABLE Ch...

If so, who is the supplier?

In particular, I work with a great kitchen supplier who orders direct and usually donates or cheaply sells extra supplies that are rejected or slightly damaged. 

And do you buy it from a local supplier or do you buy someplace we could all go?