I don't want to quote the price in US dollars or Sterling.
IMO not using fiat tag is bad choice even if the users wants to pay with Bitcoin. Most merchant usually either only show fiat tag or both fiat and BTC tag where BTC amount might be changed during checkout.
Another consideration is the fact that most buyers will not be experienced in Bitcoin. I'm thinking of suggesting that they join this forum so that they can ask any questions about Bitcoin, and I will give them my Jet Cash account name, so that they they can check on my credibility. So far I have only used Coinbase to buy Bitcoin, but I may provide another couple of exchanges to give them some choice. Do you think it is advisable to offer these recommendations, or should I let them find out for themselves on Bitcoin Talk?
You could do both, but you should mention that CoinBase doesn't accept citizens from all country and they should check it on
https://www.coinbase.com/places