ticket reseller; discount ticket shop
A shop that buys and sells gift certificates, coupons, travel vouchers, concert tickets, and similar prepaid items, often at a discount. The term 金券ショップ is also common.
See also: 金券ショップ (きんけんショップ)
I bought a Shinkansen coupon book cheaply at the ticket reseller in front of the station.
If you buy a gift certificate at a ticket reseller, it's a little cheaper than face value.
Compound of 金券 (kinken, 'cash voucher') and 屋 (ya, 'shop'). The exact historical derivation is uncertain, but the word follows a common pattern for naming specialty stores.