Amazon offers Prime members the Babybjorn Potty Chair
in Blue, model no. 055162US, for $16
with free shipping
. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $9.99.) That's $2 under our mention from last October and the lowest total price we've seen. (It's a current best by $10.) It features a built-in splash guard.
Note: Expect this item to ship in four to eight weeks.