Use this query to find all objkts in your collection - sorted by highest sales (both primary and secondary market). Replace 'String = "tz1c...' with your own Tezos wallet.

gistfile1.txt

query findSecondarySales($address: String = "tz1c2iwyckUCcicx2qxqtwLEartYFEHg1pvB")  {
  hic_et_nunc_swap(where: {status: {_in: [1]}, token: {swaps: {trades: {buyer: {address: {_eq: $address}}}}}}, order_by: {price: desc}) {
    price
    status
    token {
      title
      mime
      description
      id
      artifact_uri
    }
    timestamp
    amount
    amount_left
  }
}

You can simply copy the text from this gist in its entirety and paste it to replace the default example here: https://api.hicdex.com/graphiql/

Also see this example on how to do this through a programming language like R: https://gist.github.com/ries9112/b3198514632157c644ad6b7beae6b5f6
Using the script at the link above you can change the address to anything you'd like and run the script to be given a unique list of objkts that address owns that’s sorted from most expensive sale to cheapest. Just make sure you have the three packages that are needed installed; if you save your R script within RStudio (copy/pasting that code), you should be prompted to install the ones you are missing automatically.