Kmart offers Shop Your Way Rewards members $10 back on LEGO orders of $30 or more. (Not a member? It's free to join.) Opt for in-store pickup to dodge shipping charges, which start at around $6, or get free shipping on orders of $49 or more. (Select items are only available for in-store pickup.) A couple of best bets, with comparisons assuming you'll use the credit: Of note, Shop Your Way Rewards members will earn a Kmart credit with these purchases and may be eligible for additional credits and discounts.