I want to do few basic body animations by using motion live plug-in so which product will be good for me to purchase?
Facial Mocap Solution priced 799
Or
All-in-one Full-Body Mocap Animation Solution priced 2000$

I have to do only body animations not face

Do you have the hardware?  Specifically, do you have the Perception Neuron suit (needed to do body capture -- there are alternatives but pricier)?

If you have the suit you only need iClone/Motion Live/PN Plugin.  So you can look for bundles that include those three pieces of software.  If you do not have the suit, the suit (normally around $1800 IIRC) can be bundled with that software I do believe.  So, in short, you need all three pieces of the software AND the suit.  Whatever deal includes that is the best for you.

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Alienware Aurora R16, Win 11, i9-149000KF, 3.20GHz CPU, 64GB RAM, RTX 4090 (24GB), Samsung 870 Pro 8TB, Gen3 MVNe M-2 SSD, 4TBx2, 39" Alienware Widescreen Monitor
Mike "ex-genius" Kelley

I came across a used perception neuron suit for $850 on eBay the other day, it was said to be in an "almost new condition."
Would you recommend purchasing a used suit (considering affordability), or just saving up for a new one?

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System: Win 11_Home, CPU i9-10850k (3.60GHz), 32GB RAM, RTX3080 GPU (10GB VRAM), 2TB SSD, 2TB HDD. It's definitely time for an upgrade!