Bet you anything it is a 4300 or in that series. I spent about $350 a couple of years ago for one at the John Deere dealership. Doesn't include anything but the hood, no gaskets, hinges or anything. Couldn't figure out how to attach the gas cap with parts provided.
I just ordered a new grill and left side panel for my 4300 on Ebay as well to the tune of $276. Nothing but the plastic, have to transfer the other parts from the old parts, ie screens, headlights.
John Deere Junk with a premium price.
i bought the tractor new in 2000. I didn't drop anything on it. Actually I think it is just rotted due to exposure since it wasn't always stored inside.
The hood went first, replaced that. Now the grill locks and the plastic on bottom of the grill are broken, the left side panel is broken. Ordered the replacement grill and side panel off Ebay, not delivered yet. The cowling is cracked, the latch broke off the fuse box door in the cowling. Seems like very poor quality material for name like John Deere. Don't believe they would selling replacement parts on Ebay if this wasn't a major problem. Metal can be painted if it gets weathered and dents repaired for a few bucks. Plastic is shot when it breaks.
On top of that, a bearing in the hydraulics broke under 500 hours. Took out the hydraulic pumps. John Deere wouldn't pay the bill. after much discussion by the dealer, they finally furnished parts, I still had an $1800 labor bill with discount. The electronic fuel pump went out. the HST transmission will now hardly pull itself up a small hill while mowing the yard.
The dealer switched to Kubota due partly to these problems.
I'm going with Kioti now. Wish I could afford a new one since they have 4yr warranty. At least the metal is good on the 2000 model I just bought, no rust even.
I see lots of those little tractors. The plastic rarely breaks on it's own. There is usually some abuse or operator error. You mentioned the bearing failure at 500 hrs, but failed to mention how old the tractor was at the time of failure. I suspect there is more to both stories.