BitBay might be a bit more popular than LocalEthereum. We know about 1 link to it since March 2021 and only 1 link to LocalEthereum. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I bought my 1st ETH from localethereum.com in 2017 (website doesn't seem to exist anymore). They had an escrow account where I had to deposit cash or bank deposit and the seller had to fund with his ETH. I don't remember the spread since it's been years, however, I would just be very cautious with these websites as sometimes the seller might dupe you into sending an interac e-transfer and might deny sending you... Source: about 3 years ago
BitBay is originally Polish exchange yet (as I read somewhere) moved their business to Estonia. Also, I'd recommend Kraken. Source: over 2 years ago
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BitStamp - Provide reliable and easy to use service for companies and individuals to exchange bitcoins.