[US,US] [H] Bubble Mew paldean fates [W] 151/ ADVICE

Hey all I'm new to trading and really need some advice. I have the Mew Raw and someone is offering the following

3-151 tin boxes (4 tins 4 promo cards from Sams Club?)

3- Ascended Heros ETB

1- Prismatic surprise box.

I posted this in another group and they ran a train on me. But I dont believe everyone saw my updated offers.

If I did this, id be keeping everything sealed. Maybe rip 1 box. The Mew looks good but a 10 is unlikely. So im very torn. Ive never traded anything so please be kind. Im simply asking advice. I know the Mew is a top card. The reality is, who knows where the market goes. But I have faith in 151 so thats really whats even driving my interest in this.

Thanks for your help and advice. I really need it 😔