The term reverse bidding refers to the concept where the role of the buyers and sellers of a typical auction is reversed. So sellers bid at lower and lower prices to acquire buyers.

Purchase. Acquire. Procure. Monetarily obtain. Secure. Get. Attain.

The value of property is what someone who is at arm's length will pay to acquire the property. Different buyers have different views as to the true value so there is no one price.

There are numerous ways, ebay is good for anything but it is abit risky, or try the botcon website, another thing to do is get booking in the early to avoid other buyers taking your tiket!.

The plural of buyer is buyers.

As in "the buyers have arrived".