Cheaper vitamin c serum similar to Vichy?

[PickledOnionMonsterMunchies]

Can anyone recommend a vitamin c serum which is similar to the Vichy one? I've been using Vichy for ages but am getting fed up with the price and the tiny little bottle you get for that price! I try to eek it out but it's just not value for money and I can't justify buying this any longer. I really like the liquidy watery consistency and the fresh feeling along with the glow it leaves however.

Are there any high street or cheaper vitamin c serums that are similar to Vichy? I really dislike the primer textured ones so definitely looking for a watery one.

Geek and Gorgeous C Glow is very similar and affordable but they're based in Eastern Europe somewhere so shipping is high (unless you buy more from them, then shipping becomes cheaper), plus potential vat/import fees. I think there was a UK reseller but they tend to sell out quickly. Keep the Vichy bottles though, wash and sanitise them and then put a week's worth of serum in as the Geek and Gorgeous needs to be kept in the fridge.