We mostly have the pannier type, that go over hurdles. They are great and hard wearing. I have not replaced any of mine that I have bought, and I started collecting them over 10 years ago. If you buy them from agricultural suppliers at an agricultural show, they will sometime have a show discounts so it is a little bit cheaper than normal.
Also have some from ascott and got some lidded ones from Frenchall goats at Christmas- I ask for weird things like hayracks for presents!
Used to have mostly homemade ones at our old house, but that was helped by having wooden walls all the way up, so it was easier to hammer things in. Now we have metal walls after 4ft high. Used asticles (sp) (the wood between glass panes in proper old fashioned greenhouses- had an endless supply of them), and cover them in the thick mesh wire netting that is in dismond shapes. Worked quite well.
Oh and I have a tiny home made wooden one for kids!
Beth