Prices vary depending on location and availability, but some examples of platters offered by Costco include: Croissant Sandwich Platter (serves 16-20): $32.99 Chicken & Swiss Rollers (serves 20-24): $32.99. Though Costco does not offer traditional catering services, their selection of pre-made meals and party platters can serve as a convenient and affordable solution for your event catering needs. From sandwich assortments to gourmet cheese selections, Costco’s offerings can satisfy a variety of tastes and dietary needs.