Starting at 250€. However, the cost varies greatly, from thoughtful to generous to lavish, depending on how much spoiling you’d like to do.
If gifting one of the tour described elsewhere on this site, customized for your loved one, then the cost is that announced on that page. Often, though, those spoiling from afar will to add extra elements to the day (a meal, private transportation, a wine testing, etc.).
If gifting a wine tasting, a meal, a special event, tickets to a show, or a material gift, the final cost depends on the organizational time in addition to cost of the item(s). More extensive touring, planning and gifting has special pricing. Inquire.
See Travel Therapy: Advice, Organization if all that you need to spoil a loved one is advice on how to do it yourself.