Thank you Cashew for all these wonderful suggestions #CashtheDEW

Searing Plasma Private Eye

https://backpack.tf/profiles/76561198985910282#!/compare/1587081600/1587168000

https://backpack.tf/profiles/76561198823710225#!/compare/1587081600/1587168000 18 keys

https://backpack.tf/profiles/76561198302976864#!/compare/1587081600/1587254400

https://backpack.tf/profiles/76561198395318833#!/compare/1587168000/1587254400 17 keys + 10 ref match

https://bot.tf/stats/listings/4R0JVQ15 b/o 22

https://backpack.tf/profiles/76561198395318833#!/compare/1587168000/1587254400

https://backpack.tf/profiles/76561198121428749#!/compare/1587081600/1587254400 10 keys + orbiting fire airdog = 20

https://backpack.tf/profiles/76561198121428749#!/compare/1587340800/1587427200

https://backpack.tf/profiles/76561198800776268#!/compare/1587340800/1587427200 unknown

https://backpack.tf/profiles/76561198335718650#!/compare/1587340800/1587427200

https://backpack.tf/profiles/76561198800776268#!/compare/1587340800/1587427200 use on dappers

https://backpack.tf/profiles/76561198800776268#!/compare/1587340800/1587427200

https://backpack.tf/profiles/76561198305494036#!/compare/1587340800/1587427200 sold to buy order for 15 keys + 32 ref

b/o was 16 https://bot.tf/stats/item?def=388&q=5&ef=Searing%20Plasma&craft=1&aus=0&ks=0

https://backpack.tf/profiles/76561198305494036#!/compare/1588118400/1588204800

https://backpack.tf/profiles/76561198253835120#!/compare/1588032000/1588204800 only 11 keys match

https://backpack.tf/profiles/76561198253835120#!/compare/1588204800/1588291200

https://backpack.tf/profiles/76561198817647410#!/compare/1588204800/1588291200 something's up with the history, ignoring

https://backpack.tf/profiles/76561198817647410#!/compare/1588723200/1588809600

https://backpack.tf/profiles/76561198077934343#!/compare/1587772800/1588723200 15 keys

https://backpack.tf/profiles/76561198077934343#!/compare/1588723200/1589328000

https://backpack.tf/profiles/76561198871163068#!/compare/1588636800/1588723200 quicksold

buy orders at 15.7. Cheapest seller is 20

Known sales are 15, 15.5, 17, 18, 20. taking 17 - 20

17 - 20