Most of the ones on Ebay should work, as long as they have the right chipsets. It uses a U24060 and MAX232 IC chip. https://easyeda.com/mc_coolman/nissan_c ... d76b8370ac
You can actually build one yourself, if your electronically inclined. I bought one off Ebay several years ago for $20, and it works like a champ. It's really up to what software you're using that will determine how useful it is. If you spring for the paid version of Datascan I, it should be fairly helpful in testing 70% of what the real Nissan Consult I is capable of. Of course, it can't come close to what a genuine Nissan Consult II handheld can do- but those go for at least $1000 used. I saw one on Ebay for $800 not long ago, and contemplated on buying it. I held off for a day, and it was already sold.