It’s super easy to replace spindle bearings and the spindles with grease zerks aren’t for greasing the bearings. All that happens when you squirt grease in there is the void gets filled with grease, the bearings are sealed. You can get a six pack of bearings on Amazon for $20 and replace all of them when you sharpen the blades. It might take a little elbow grease to pop the old ones out but all you need to put the new ones in is a couple boards and a mallet. I would not base my buying decision on whether or not you have the “placebo” grease zerks.
And they will be lucky to remain intact for the life of the edge of the blade .
Don't get me wrong , I love those bearings because so many fall apart and trash the housing, blades and even decks
I make thousands out of them every year and it takes a lot less time to swap out the complete assembly than to replace the bearings and the profit on each is the same and I end up with the Aluminium, blade bolt, pulley nut & spindle which I can on sell.
Love the customers who fit rubbish bearings, should be more of them.
Even better when they knock them in with a block of wood or just by tightening the blade bolt and don't bother to use either a drift or punch.