For small amounts, I like CoinPlaza.it (Referal link in
LoyceMobile's signature). The minimum is 0.001
BTC, which now takes 126.73 XLM.
If you want to exchange less, you can get 78903 satoshi on the Bitcoin Lightning Network for 100 XLM. I like this exchange because of the 1% fee without additional transaction cost.
I used crypto exchanges to exchange the coins but this is a new method for me.
I have bookmarked CoinPlaza.it for my reference. Is there any other trusted exchange site which offer more coins to exchange as coinplaza does not allow you to exchange bulk quantity of coins and it also offers limited number of coins.