Where to start with budget of $2500ish.

Hello I have a budget of about 2500 and already have a ballistic team wendy helmet and norotos mount. Now it’s time to get the actual tubes. I was looking for some overrun/used Omni 8s or 7s green phos but haven’t been able to find anything good on gafs or eBay. Can anyone recommend a product or vendor to look in to? Any help would be greatly appreciated as I’m an old guy without great internet abilities. thanks!

If anyone has anything for sale I’m also interested in that! as long there’s no major blems. thanks once again