All exchanges that accept skrill already mention above.
PayBis is good the fee is fine. I suggest you don't use the spectrocoin it is well-know freezing account.
Look at these threads below.
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Spectrocoin a scam-
Beware ! Scam ! spectrocoin.com ! Stay away from Spectrocoin ! Shady Company.So I don't recommend it to use.
For Bitpanda never heard this exchange but I see some good reviews about this exchange from reputable people here on the forum.
This is one didn't mention yet. You can try Lykke app they accept skrill as payment method for depositing and you can use their exchange to buy crypto.
Their official thread can be found from here
https://bitcointalk.org/index.php?topic=1402110.0