I agree Tim but I've only made one swap meet in the last 5 years due to walking issues.
Way less vendor trucks loaded with parts shown on the table- most are smaller tables and a salesman with catalogs at one! Don't see what you need? It may be available from the catalog. Ask the salesman.
Times are tough for the vendors with the internet nowdays, Someone will almost undercut the prices.
Many internet sellers do not even have the parts they are selling. Drop ship-drop ship. They don't own the parts just sell them from a large warehouse. Or many many warehouses.
They vendors have a second problem-protecting their name-products must be of a good known quality or risk negative feedback, lose customers. Most stock the products they sell - extra costs.
The internet seller may or may not be of good rep. and may not be in bus, for long, At least under the current name.
All that said I have loved to look, examine quality and purchase at what was a competitive price.
Missing the Old Days already!? LOL.
DJ