On the Bondora Secondary Market, you can buy both individual loans and whole portfolios. If you want to buy portfolios, check "Show portfolios" in the upper right corner.
Next, browse the loans for offers that suit you. Read the rest of the support articles in the Secondary Market category for some tips in case you are still unsure of what to look for when choosing.
On the far right of each line, you will find the symbol of a shopping cart. If you click on it, you have not yet bought the loan or portfolio. You will need to confirm your purchase and the new contracts to complete the purchase. All items in the shopping cart are reserved, but not binding for you.