Due to OTC is a free trading system between sellers and buyers, sellers usually place an order higher than the market price to get the best income. Thus, the price will cost buyers more than the market price, but buyers could choose to sell out the coins they just bought with a higher price much easier.
The way, the price, and the risk of the trading in OTC is different from regular trading companies, so there will be a price gap.
Trading fee: OTCBTC will charge a commission from the offeror for posting an offer and completing an order. Read “OTCBTC fee information”
Trading method: There’s lots of different ways to pay on OTCBTC, such as bank transfer, Alipay, Wechat, and Paypal. This is why we are so unique from other trading company.
Trading risk: It’s more risky in OTC trading, such as fraud. Please read “How to identify frauds?”
To sum, the prices here are different from other trading companies is because of the trading pattern. Of course, you could also find prices that are lower than the market price. Sellers may need to get money in a hurry, so they will sell out their coins cheaper.