Is there any way to exchange a small amount of Bitcoin to PayPal (for example one dolar)?
if you like using Coinbase and if you are ok with their rules, i hear they have added paypal withdrawals only to their site which you can use to sell bitcoin to fiat and withdraw paypal.
but in any other case i suggest finding someone on the currency exchange board with a good reputation and sell it to them because paypal has charge back which will create a lot of problems for you if you trade with an un-trusted member.