Hardware Humidity inside the screen: easy fix?

[Razzee]

Hello.

I'm looking for a Nintendo 3DS XL to purchase, and found one costing around US$ 53.00 (but in my currency) less than the others. The price is +-US$ 98.00.

However, it seems to have humidity inside the screen, since the seller left it stored for too long without use.

Is it worth getting a system like this, or given the work needed to clean the space between the plastic and the screen I should look elsewhere?

Listing: https://shopee.com.br/Nintendo-3DS-XL-Vermelho-i.1224081624.2...

I have seen many other regular 3DS and 3DS XL systems with the same issue, and a NDS Lite with mold. Not a single PSP/PS Vita I saw had that.

Handheld-wise, I only have experience with opening PSP, but it does not even count given how easy it is.

Thanks in advance.