The server injects the Interface fee and checks the position is transferable. You sign the Seaport order with your wallet (gasless) — it becomes fillable immediately. The 1% fee is split 50/50: the buyer pays your price plus 0.5%, and you receive your price minus 0.5%.
How sAERO allocation works. An sAERO position's staked AERO and its Allocation Power transfer with the NFT, along with any unclaimed exchange revenue, which is not included in the underlying value shown. A decaying stake can be withdrawn only after its staking period ends. Withdrawal also requires every allocation to be removed first, including allocations on other Aero chains. Re-allocating is subject to a cooldown (currently about 47 hours) that carries over to the buyer.