BUY and Sell Logic Development

Please do not place bid without reading the project requirements below PROJECT REQUIREMENTS BUY and SELL LOGIC DEVELOPMENT * User signs up for a FREE membership account and needs to UPGRADES with a once of fee of $50 using Paypal or Bitcoins, to purchase a position/spot * User is allowed to have a maximum of 4 position/spots under one verified account, user can only fill in 1 position/spot every 6 hours - meaning within 24 hours user can fill in all 4 position/spots * Once a position/spot has 4 buyers assigned to seller position available for sale - Once seller has received $100 from the sale, user will now need to buy a new Spot for $50 from another seller to unlock the other balance of $100. Seller can never at any time be able to buy his/her own position/spot * When a user wants to sell his/her matured position/spot - user needs to create a Post Ad and interested Buyers will select the open position/spot he/she wants to buy * User needs to Deposit Funds into his/her account to in order to purchase any available position/spot. * User can only Request to withdraw Available Funds ( which is the profit ) made from selling the position/spots * Account Balance will show the total amount of $200 that user needs to have as a positive balance at all times, this amount is made up of 4 position/spot $50 x 4 = $200 ) plus it will show the total Profit amount shown on Available Funds, meaning the total amount shown on Account Balance is $400 once balance reaches $100 user needs to buy new spot/position in order to request to withdraw available funds of $100