Allan,
Another point about wheel rakes is transport width. The 10 wheel Vermeer I have is fairly wide in transport position. I noticed a new Hesston V rake which folded the whels into a much tighter position. However it has a narrow wheel spacing which I think would make it more likely to turn over when making turns on a hillside with the wheels raised or when transporting it on the road. Of course, you don't have hills there.
On a V rake you have to adjust the width of the windrow for different amounts of hay. One theory also is that the hay in the middle of the windrow is not disturbed and the baler will not pick it up because it has flattened down on the ground. Some rakes have an extra wheel in the front center to turn that hay. Haven't noticed that being a problem.
The inline rakes have the tongue swing over into transport position which makes for a narrow, but long transport width. Each wheel floats individually, neat for rough ground. As I said on my earlier post, combining 2 or more windrows is no problem. Gary said he had a 9 wheel and he could describe better an inline rake's operation.
In looking at used wheel rakes the first thing to check is the condition of the rake teeth. Compare the used teeth with a new one.
KEH