I have SWIFT offers on Haveno, you may want to check. To find my offers search "horixon"
Coinmarketcap and Coingecko track both DEX and CEX prices.
#monero-turkce:monero.social for Turkish matrix group.
Localmonero/Agoradesk trader here.
Every payment method and country have its own market price. For an example central exchanges doesn't accept Paypal, Cashapp, gift cards, Cash at ATM etc. Most of them only accepts bank transfers. So you're comparing apples to oranges.
Even if you compare bank transfer offers you have to keep in your mind; some banks blacklist central exchange's bank details, so you can't make money transfer and/or it has much less strict KYC which is more privacy friendly.
Also you can benefit from OTC advantages like there's someone can help you directly and/or can offer custom solutions for you.
Maybe be a bit transparent to your customers. Looks like scam.
As a P2P trader from localmonero;
Every single offer requires me to lock 115% XMR so If I want to accept multiple payment methods or currency I have to make separate offers.
For an example If I have 100 XMR to sell I have to split my coins to smaller amounts. (For an example 50 XMR for bank transfer 50 XMR for international bank transfer)
As a person who had like 20-30 different offer on localmonero:
100XMR/30 offer = <3.3 XMR max per offerwhich is very small for me. Instead i just make big offers that is very popular such as Euro and USD & SEPA. Sometimes i don't use haveno at all...This causing to small markets never grow.