Our MoP Classic item table (the Blizzard item records our Auction House scanner has collected) has 4 other held in off-hand items between item level 264 and 289; 0 of them carry fixed stats.
Cheapest listed held in off-hand items at a similar or higher item level: Sishir Crystal at 20 gold (item level 283, requires level 79), Swamplight Crystal at 45 gold (item level 278, requires level 78), Moonbrook Crystal at 110 gold (item level 272, requires level 77).
Connected realms with a listing in the latest MoP Classic scan: EU 0 of 25, KR 0 of 5, TW 0 of 8, US 0 of 23.
Item data: MoP Classic client datamine, build 5.5.4.70631. Prices: per-unit buyouts from one Blizzard Auction House snapshot per connected realm per hour; market is the quantity-weighted median of a realm's listings. Retail column: the retail client datamine.
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