I don’t want to be “that guy” but have you looked into your needs? Will you ever go beyond 10G? Because Salt has a very good offer where you have 10G symmetrical for 40Chf/month (if you also have mobile. 50 if you don’t). We have had that for years without issues.
The 500Gb version is refurbished around 380 which basically means like new. So up to you if the 100 discount is worth the downgrade. Also I realise that the refurbished one is often sold out so you’ll have to be fast to get one.