Storm, no offense, but you seem to have missed the fact that this already happened, many, many years ago.
Shields *are* for sale. They're just not for sale from EA. Instead, it's entire accounts being sold, ones which have either shields, or unclaimed rewards, of at least a certain age. I've received, at last count, 7 offers to buy such accounts just this month. They're also listed for sale on many UO sites, though not on this particular site. Wouldn't you rather see EA/OSI/Mythic/Broadsword/whoever make the money, rather than 3rd party players (to the nature of $700-$2000, based on this month's offers)?
Oh, by the way? I really could care less how many accounts you run, or how long you've been playing. It makes no difference how many accounts you have, or how many houses, or how much gold. You are still a single person in this community. Those who farm already own shields, in abundance. (Side note, I fail to see why you think specifically old accounts w/store-purchased shields would suddenly be used for shield use.)
If it tells you something about how long I've played, my first character was born in Occlo. I've personally run anywhere for 2 to 35 accounts at any one given time, and currently run 14 of them. I've left UO, and come back to UO, several times. And it seems that I've had this argument in the past. The inequality of shields today is the greatest inequality created by any vet reward, in my opinion, but it's not the first time that such an inequality has existed. When the "etheral" horse first came out, anyone who actually still had to spend gold buying replacement horses - 1k was actually a decent amount then, and no pet bonding/resurrection, remember - was at a disadvantage. Then there was the time when my very popular scribe shop suddenly lost 90% of its customers, because I didn't have the brand new runebook dye tub, and nearly all traffic shifted to those few players who could sell *colored* runebooks.
I argued way back as far as the first ethereal that vet rewards should only ever be status symbols, and NEVER items with functionality otherwise unavailable to the brand new player who is sufficiently determined to earn sufficient gold (or, I guess, with the EA store, willing to spend real life $). I still will argue this.
Plus, realistically, if they're farming resources and selling them (or the gold that comes from selling them), the profit involved from a fully loaded trip w/60k deeds would far outweigh the cost, to that theoretical farmer, of a single transfer token. So either way, they already can (and do) do what you fear, so what other argument do you have against it?