A Banbridge classroom assistant has been given a quote of £573 to have a guitar delivered from Wales - almost the same price as the instrument itself.
Dale Fusco was shocked when he was told how much it would cost to ship.
He said it was just one more unintended consequence of Brexit.
Mr Fusco, who has a sizeable guitar collection, said he never expected to be charged so much for a delivery.
"I buy guitars from England all the time," he said.
"One guitar I found on eBay, a guy who lives in Cardiff has it and he wasn't posting it, but said he was happy to sell it to me if I arranged my own postage and courier."
The electric guitar, a Charvel made in California in the 1970s, is worth around £650.
"I went on to Shiply. I've used it before when I've bought guitars from England, and normally it costs £25 or £30, and that includes your insurance," he explained.
The Shiply price was the most expensive he found.
He eventually got quotes approaching £200 for the same service.
But he said the price was still too much compared to what he was paying pre-Brexit.
"You could get a ferry to go and get it for the same price, if it wasn't non-essential travel," he added.
Mr Fusco said he normally used DPD to ship guitars to add to his collection, having received a lot that way.
However, DPD has now said it will not offer that service for guitar deliveries to here and refused to give a quote.
"One of the companies in England called Rich Tones, who I've bought stuff off in the past, they use DPD and on their website they're saying there's disruption," he said.
It won't stop him adding to his collection but it will mean he has to be more careful about where he shops, or travel over the Irish Sea himself for purchases.
"I'll just have to keep looking for guitars in Northern Ireland," he said.
"I've bought maybe four or five guitars out of England, and I went to college there, so I might have to go over and stay with my friends and buy guitars that way.
"This is the first time I've bought a guitar and it's said it's going to be £500 postage."
He said the reality of Brexit was now "starting to bite a wee bit" as we are forced to change the way we shop.
"Amazon has even stopped delivering beer here," he said.
"If you're anything like me, you just go to Amazon and swipe right.
"I'm not sure whether we're all going to have to just buy what we can get locally.
"We're all going to have to start paying more postage if we want to buy things out of Great Britain.
"We're starting to see the effects of it now and the ordinary man on the street is starting to have to pay or not get the stuff at all."
Shiply has been asked for a response.