Don't confuse the starting price and reserve price. The starting price is the lowest amount the seller has determined to start the bidding process. The reserve price is the minimum price the seller will allow the item to be sold for. Generally the reserve price is not shown.
You have three choices:
Message the seller and ask what their reserve price is and then decide if you want to bid that amount.
OR
Determine what is the highest amount you would bid and enter the bid. If you meet the reserve, the item will be sold to you provided no other bidder outbids you.
OR
Enter small bid amounts (nibble bids) and work your way up to the point the reserve is met.
Bidding and being the high bidder without meeting the reserve price will not result in you winning. The seller can not drop or reduce the reserve price without also reducing your bid, Basically you are free to move on to other auctions without having to worry about winning the auction you have already bid on.
)
Invoice
)
)
)