NanoShop Item Values

local mainFrame=24

rednet.open("right")

function checkForItems()
    turtle.suck()
    turtle.select(1)
    local detail=turtle.getItemDetail(1)
    if detail==nil then return end
    local id=detail.name
    repeat
        rednet.send(mainFrame,"getValue,"..id,"NanoShop")
        local i,value=rednet.receive()
        if i==mainFrame then
            if value=="false" then
                os.setComputerLabel("This item is worthless")
            else
                os.setComputerLabel("This item is worth "..value.." NanoCredits")
            end
            turtle.select(1)
            turtle.drop()
            sleep(5)
            os.setComputerLabel("Item Values")
        end
    until i==mainFrame
end

function setup()
    term.clear()
    term.setCursorPos(1,1)
    print([[Welcome to the NanoTech shop!

I will assist you by telling you the values of items. This is the ammount of NanoCredit you get for selling this item at the terminal across from me.

Place an item on the ground in front of me and I will analyse and value the item.]])
end
setup()


while true do
    checkForItems()
    sleep(2)
end