I have 3 important questions for the BPs and EOS community and EOS devs.
Source: https://www.marketstackd.io/ramcalculator.html#
If we have certain amount of EOS in our account, and we sell RAM:
1- We will receive more EOS in exchange, correct?
2-After selling RAM, can we sell the EOS used to sell the RAM? Or need to wait time?
3- What happens if we sell our EOS (from the account we sold the ram). We can sell EOS immediately and leave the account with no EOS?
I just want to understand how selling RAM impacts on the EOS our account has, and if we need to wait to sell the EOS. Because, if we sell the RAM, and then we send our EOS (were the RAM was sold), to an exchange and sell it, and then we buy more EOS and send it to the same account or another account we help, what happens with RAM?
Perhaps 
Here is a great post from 
And this is the tool he created: https://www.marketstackd.io/ramcalculator.html#
ANSWERS FROM (Thanks for the great answers to my questions)
first a bit of background on buying/selling ram on EOS
its not like a the SBD/STEEM internal market or any exchange like gdax or binance... instead of buying and selling with another person you are buying / selling directly with the eosio.system contract itself.
so to answer 1) when you sell ram back to the system contract, you receive an amount of liquid EOS proportionate to the current spot price of ram. if spot ram price is high, your receive more EOS in return. if spot ram price is low, you receive less EOS in return. the spot price is determined by something called the bancor algorithm (whitepaper: https://storage.googleapis.com/website-bancor/2018/04/01ba8253-bancor_protocol_whitepaper_en.pdf)
to answer 2) after selling the RAM, you're EOS is liquid and thus available to do whatever you want with it
as for 3) if you sell all your ram, you might not be able to do anything with that account anymore (there's a minimum amount of ram needed to function). but no, there's nothing really stopping you from doing whatever you want with your EOS after your sell RAM. its not like delegation where you have to wait 3 days.
hopefully that was clear, if not, please ask
Hope I made my questions in a way easy to understand.
Thanks for your help in advance!
DISCLAIMER
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This shall not be taken as financial advice. I am not a financial advisor and none of your investing should be carried out based on any information presented here. You can lose all of your money investing in crypto currencies. The information above is for educational and entertainment purposes only.