I am planning a 2nd honeymoon in mid October and would like to stay about 5 nights in Paris near the Luxemborg gardins or on Ile St. Louis. I am wondering if anyone has a recommendation for a small/quite/charming hotel or apartment between 200 and 240 euros.

I'd start by doing a search here. You will get many agencies that are recommended, and others like vrbo.com

This is a common topic, and I think you will find much discussion to help you choose.

Maxers,

And to be more specific this one is from a Fodor's post:
http://www.vrbo.com/28993#morephotos.

It looks like a great place, but we have not had a chance to stay there yet.

Greg

The web sites can be great, but a bit overwhelming. Does anyone have personal travel experience in these areas of Paris?

For a second honeymoon I would choose a hotel--concierge to make reservations, give advice, etc. Beds made up. Breakfast downstairs if you want it. In your price range I am sure there is a good choice.

Alternatively, for a honeymoon I'd prefer the privacy of an apartment. However, for such an important occasion, I wouldn't put out money, sight unseen, on a VRBO apartment. Go to a reliable agency. Search Fodors for agency recommendations; this is a common topic. Or go to www.slowtrav.com. Lots of apartment rental reviews there.

We rented from guestapartment.fr. They were wonderful. They offer many services (and you pay for it ) as well as beautiful apartments, a number of which are on Ile Saint Louis. We stayed in the Bretonvilliers 1-bedroom; some of the studios should be within your budget. It was a pleasure to deal with this agency and I would book with them again without hesitation.