Originally Posted by
grahampros
Yes, do it. There is no reason not to. This is not that unusual on most any airline, making changes on restricted tickets. The the risk of lower fares you take.
Indeed, that's what I ended up doing in the end. I did speak with United beforehand and the rep, after checking the flight change charges, told me the same thing: buy one way and don't use the inbound leg on the original ticket.