Boost FB-Page with Fivver?

Hey guys,

I have a FB Page with over 200k Likes, but in the last time I do not get any likes. Daily I lose like 10-50 likes and my Posts wont get viral. So I though about it to get viral again with the help of fivver. Is fivver a good option to boost your page or is there any better way. I want to spend like at least 200-300 $.

EDIT: I mean, that I would find someone who is sharing my stuff at groups and so on.
I do not have so much time for it, cuz I need the time for other procets.