Vintage Goosebumps Books for sale or trade

They're $4 each, or willing to trade. Here's the numbers I am willing to trade for: #5, #6, #44, #46, #48, #49, #50, #52, #53, #54, #56, #57, #58, #59, #60, #61, #62. I'm also open to trading for Fright Time or Shivers books depending on which of those I don't already have.