They look like they were legs for an old sink perhaps. Not sure what I would do with them though. Did you come up with any ideas yet? Did you end up getting them?

Sue, I actually thought this post had been deleted by the Houzz powers-that-be for some mysterious reason. It had disappeared from my Posts and Activity files.
To answer your questions, I had only come up with two possible uses - the world’s biggest garden hose guides or supports for multiple bird baths. They are asking $150 for all six of them so I won’t try to buy them without some purpose in mind. I thought that the many creative minds on Houzz might be able to suggest something I’m missing.

potting bench?

Lesli, that would have been a great idea! I could see those as legs for a potting bench, especially with rebar or dowels running through the centre to take some of the weight. However, last summer, my husband and friend built me a great garden shed complete with two work benches ...

wow! Love them! my hubby built my greenhouse, he's not excited about a potting shed :-(