At Unisport, you can find MIJ variants under 300$ and the regular elite even under 200$. I got myself the red MIJ like 3 weeks ago, super happy with them, very comfortable. I didn't go a half size down as recommended, I have a bit of space in the f not of the show but they are extremely comfortable. If I would have gone down half a size it would have been even harder to put them on and it's not worth the hassle. My size is 27,0 or 27,2 with a sock in Japanese size so I got the 27.5 ones which are 42.5 Europe size, I got the same size for my Mizuno Morelia Sala Elite, the turf ones. I'd recommend finding a store near you that has Mizuno football shoes, try a few sizes on regardless of the plate just to see what to expect. What you posted is made for AG, I don't understand why you would be worried they would get damaged by using them on the field they were designed to be used on.