I wouldn't bother buying a used OE shock, most will be well past their best. Mine was goosed at 10K miles.
If the one at the breakers has a red spring it could be a Hagon shock, which may well be worth giving a try if the price is right (they're �300 new). Does it look like this...
If the worst comes to the worst the Hagons are fully rebuildable, unlike the OE ones.