Partridge developed a marketing plan that involved the purchase and sale of travel vouchers. The travel vouchers had little value for sale purposes, but could be redeemed. A person purchased a packet of travel vouchers for $500 but knew that the broker selling it had paid only $62.50. The participant purchased the packet not to acquire and use the vouchers, but only to become a seller of packets and benefit from the markup when selling to new participants. Partridge discussed the scheme with several acquaintances who thought it was a good idea if enough participants became involved. Is this a legitimate multi-level selling venture or a pyramid scheme prohibited by law? How can Partridge find out if his plan is legitimate?