Just about any reasonably modern HR rig that is in good working shape will be a fine starter. Heck, that's all I had for many years, and I still had a world of fun. GL! --ken
One thing to beware of - the FT100D you found on ebay is a fine radio (I have one myself), but if the finals ever go - you can forget about getting it repaired. The transistors used were specific to the unit, and are currently unobtanium. you should research the repairability of any radio that they end up buying.