Building on the earlier suggestion, I definitely think you need to look into tools that use residential proxies if you are hitting walls with Farfetch. I went through the same nightmare last year trying to track Italian distributors and got blocked constantly... it is a huge time sink. Honestly, I have been using Hexowatch for about 18 months now and I am really happy with it. It basically does the heavy lifting for my boutique without all the bot detection drama.

• Hexowatch: Their pro plan is around 45 quid which fits your budget perfectly. It tracks price changes and even stock levels.
• Browse AI: This one is super easy to use because you can basically train a robot in two minutes just by clicking on the price and SKU.
• Proxy settings: Whatever you choose, make sure it has a residential proxy toggle. That is the secret sauce for luxury sites like Farfetch that hate scrapers. The currency thing is always tricky tho. Hexowatch lets you set the location of the monitor, so I usually set mine to Germany or Italy to get the raw Euro price before it hits the UK site. Works like a charm and saves me so much manual math lol. Definitely beats refreshing pages at 2am like a crazy person... hope you find something that works!

TL;DR: Try Visualping or Distill.io. They are way better than basic scrapers for luxury sites, but dont set the refresh rate too high or the sites will definitely block your IP. Honestly, I feel your pain. Doing manual checks for three years is wild... I would have lost my mind by now. Since you are dealing with Farfetch and EU distributors, you really have to be careful about bot detection. Those high-end sites use some pretty aggressive tech to block scrapers, so the basic scripts just wont cut it anymore. You might want to consider Visualping. It basically monitors specific text areas like the price tag and sends an alert. Their mid-tier plans should fit your 50 quid budget easily. Just a heads up tho: make sure to use their proxy options if they offer them for your tier, because it helps bypass those 'access denied' screens you get on luxury portals. It is a bit of a cat and mouse game tbh. Another one to look at is Distill Web Monitor. It can run as a browser extension, which is honestly a life saver because it uses your actual browser session to check the page. This makes it way harder for Farfetch to flag you as a bot compared to a server-side scraper. Just be careful not to track hundreds of SKUs at once or your browser will start lagging like crazy. It handles the currency conversion issue naturally because it just reads the price directly off the local version of the page you are on. Btw, I actually found PriceDropCatch helps me catch those random overnight price drops Kohl's loves to do.