Final answer:
Selling a record collection on eBay is considered a Consumer to Consumer (C2C) e-commerce transaction, where individuals buy and sell goods amongst themselves.
Step-by-step explanation:
Selling your record collection on eBay is a form of Consumer to Consumer (C2C) e-commerce transaction. As a platform, eBay allows individual consumers to list items for sale, which are then purchased by other individual consumers. This does not involve businesses or governments as the primary actors, distinguishing it from Business to Consumer (B2C), Consumer to Government (C2G), and Business to Government (B2G) transactions.