tbh I can't seem to find a price for the particular model you've mentioned, "525", but looking at the more recent Harmony releases, they're £75+.
I think £25+ is probably in my view expensive, considering I've already got all the equipment to do the exact same job, although more akward.
I'd need to be sensible, given I've only got 5 devices, I think
@channelking 's suggestion would be more appropriate for me.