Wayfair is nothing more than a "front end" for sellers .... this is the text for potential sellers interested in joining:
Wayfair is an American online seller of home goods and furniture. They operate in other countries such as Canada, Ireland and the UK.
They are exclusively a homewares marketplace and a leading marketplace for items in the home categories.
To become a seller on Wayfair, you are required to complete the seller application form.
Wayfair operate a drop shipping model meaning they don't hold the stock of merchants.
Once a sale is made, Wayfair will notify you of the order. You are then required to fulfil the order using Wayfair's courier accounts. The delivery then arrives at the buyer with a Wayfair packing slip.
Wayfair charges sellers a small commission, but also negotiate pricing with their merchants. This typically tends to be on a wholesale price basis.
As with Amazon and other sales front-ends (even ebay) it's often very simple to find the actual supplier and deal direct, often at a lower price* - the sellers use the front-ends as a fast-track to greater exposure at relatively low cost. What is unclear is where the buyer/seller contract sits . . . .
Drifting back to the OP it does seem that an awful lot of goods of all varieties are in short supply - try buying an entry-level or mid-range bicycle!
* and the same applies for hotel bookings - find it on booking.com, get a better deal direct
